Motor and motor assembly

Abstract

To provide a motor and a motor assembly capable of adjusting a positional relationship between two bearing members.SOLUTION: A motor according to the present invention includes: a shaft portion; a first bearing member that supports the shaft portion; a second bearing member that is disposed apart from the first bearing member in an axial direction of the first bearing member and supports the shaft portion; a housing that supports the first bearing member and defines a hollow portion in which the second bearing member is disposed; a bearing support that is disposed in the hollow portion and supports the second bearing member; and at least three positioning members that are movably attached to the housing at different positions in a circumferential direction of the first bearing member and abut on the bearing support from an outer side in a radial direction of the first bearing member, thereby positioning a position of the bearing support with respect to the housing along an orthogonal plane orthogonal to the axial direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a motor and a motor assembly. [Background technology]

[0002] BACKGROUND ART Conventionally, motors equipped with two bearing members that support a shaft portion have been known (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5033552 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a motor such as that described in Patent Document 1, if the two bearing members that support the shaft are not in the desired positional relationship, the load on each bearing member increases, which may result in a decrease in energy efficiency.

[0005] An object of the present invention is to provide a motor and a motor assembly in which the positional relationship between two bearing members can be adjusted. [Means for solving the problem]

[0006] A motor according to a first aspect of the present invention comprises: (1) A shaft portion; a first bearing member that supports the shaft portion; a second bearing member that is disposed apart from the first bearing member in the axial direction of the first bearing member and supports the shaft portion; a housing that supports the first bearing member and defines a hollow portion in which the second bearing member is disposed; a bearing support member disposed in the hollow portion and supporting the second bearing member; and at least three positioning members that are movably attached to the housing at different circumferential positions of the first bearing member and that abut against the bearing support from the radial outside of the first bearing member, thereby positioning the bearing support relative to the housing along an orthogonal plane perpendicular to the axial direction.

[0007] A motor according to one embodiment of the present invention comprises: (2) The motor according to (1) above, wherein each of the at least three positioning members is movable in the radial direction relative to the housing.

[0008] A motor according to one embodiment of the present invention comprises: (3) The motor according to (2) above, wherein each of the at least three positioning members is a screw that can be threaded into the housing.

[0009] A motor according to one embodiment of the present invention comprises: (4) The motor according to (3) above, wherein an insertion recess into which the screw can be inserted is formed on the outer surface of the bearing support.

[0010] A motor according to one embodiment of the present invention comprises: (5) In the motor according to any one of (1) to (4) above, the at least three positioning members are arranged at equal intervals in the circumferential direction.

[0011] A motor according to one embodiment of the present invention comprises: (6) a coil supported by the bearing support; The motor according to any one of (1) to (5) above, further comprising: a rotor attached to the shaft portion and including a magnetic pole portion having a magnetic pole surface that faces the coil in the axial direction.

[0012] A motor assembly according to a second aspect of the present invention comprises: (7) The motor according to any one of (1) to (6) above; a reducer connected to the motor. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a motor and a motor assembly in which the positional relationship between two bearing members can be adjusted. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a partial cross-sectional view of a motor assembly according to an embodiment of the present invention, including a motor according to an embodiment of the present invention; [Figure 2] FIG. 2 is a cross-sectional view taken along line II in FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 4A] 10 is a diagram showing a state in which the central axis of the first bearing member and the central axis of the second bearing member are misaligned in an in-plane direction along an orthogonal plane perpendicular to the axial direction. FIG. [Figure 4B] 4B is a diagram showing a state in which the relative positional relationship between the first bearing member and the second bearing member is adjusted by moving the positioning member with respect to the housing from the state shown in FIG. 4A. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a motor and a motor assembly according to the present invention will be described with reference to the drawings. In each drawing, the same components are designated by the same reference numerals.

[0016] 1 is a partial cross-sectional view showing a motor assembly 200 as one embodiment of a motor assembly according to the present invention. Motor assembly 200 includes a motor 1 as one embodiment of a motor according to the present invention, and a reducer 100. Motor 1 and motor assembly 200 can be used in, for example, vehicles, robots, home appliances, communication equipment, medical equipment, commercial equipment, industrial equipment, etc., but their uses are not particularly limited.

[0017] Fig. 2 is a cross-sectional view taken along line II in Fig. 1. Fig. 3 is a cross-sectional view taken along line II-II in Fig. 1. Specifically, Fig. 2 shows a cross-section of motor assembly 200 taken along a plane perpendicular to axial direction A that passes between bearing support 20 and second rotor 60. Fig. 3 also shows a cross-section of motor assembly 200 taken along a plane perpendicular to axial direction A that passes between bearing support 20 and magnetic pole portion 52 of first rotor 50.

[0018] As shown in FIG. 1, the motor 1 includes a shaft portion 2, a first bearing member 4, a second bearing member 5, a housing 10, a bearing support 20, and a positioning member 30.

[0019] The shaft portion 2 extends linearly. The outer peripheral surface of the shaft portion 2 has a first outer peripheral surface portion 2a that contacts the inner peripheral surface 4a of the first bearing member 4. The outer peripheral surface of the shaft portion 2 also has a second outer peripheral surface portion 2b that contacts the inner peripheral surface 5a of the second bearing member 5. The first outer peripheral surface portion 2a and the second outer peripheral surface portion 2b are arranged apart from each other in the extension direction of the shaft portion 2.

[0020] The shank 2 of this embodiment has a circular outer shape in cross section, regardless of its position in the extension direction. However, the shank 2 may have a portion in its extension direction where the outer shape in cross section is not circular. Furthermore, the shank 2 of this embodiment has a constant outer diameter regardless of its position in the extension direction. Therefore, in this embodiment, the outer diameters of the first outer peripheral surface portion 2a and the second outer peripheral surface portion 2b are the same. However, the shank 2 may have a portion in its extension direction where the outer diameters are different. In other words, the outer diameters of the first outer peripheral surface portion 2a and the second outer peripheral surface portion 2b may be different.

[0021] The first bearing member 4 rotatably supports the shaft portion 2. The first bearing member 4 has an inner peripheral surface 4a serving as a bearing surface that contacts the first outer peripheral surface portion 2a of the shaft portion 2. The inner peripheral surface 4a serving as a bearing surface of the first bearing member 4 defines a central axis O1. For ease of explanation, the central axis O1 of the bearing surface of the first bearing member 4 will be referred to as the "central axis O1 of the first bearing member 4." Furthermore, the direction along the central axis O1 of the first bearing member 4 will be referred to as the "axial direction A." Furthermore, the direction around the central axis O1 of the first bearing member 4 will be referred to as the "circumferential direction B." Furthermore, the radial direction of an imaginary circle centered on the central axis O1 of the first bearing member 4 will be referred to as the "radial direction C."

[0022] The second bearing member 5 rotatably supports the shaft portion 2. The second bearing member 5 has an inner peripheral surface 5a serving as a bearing surface that contacts the second outer peripheral surface portion 2b of the shaft portion 2. The inner peripheral surface 5a serving as a bearing surface of the second bearing member 5 is disposed so as to define a central axis O2 that extends parallel to the central axis O1 of the inner peripheral surface 4a serving as a bearing surface of the first bearing member 4. Hereinafter, for convenience of explanation, the central axis O2 of the bearing surface of the second bearing member 5 will be referred to as the "central axis O2 of the second bearing member 5." The second bearing member 5 is disposed spaced apart from the first bearing member 4 in the axial direction A.

[0023] For ease of explanation, the side in the axial direction A on which the first bearing member 4 is located relative to the second bearing member 5 will be referred to as the "left side," and the other side in the axial direction A on which the second bearing member 5 is located relative to the first bearing member 4 will be referred to as the "right side."

[0024] The first bearing member 4 and the second bearing member 5 are constituted by bearings. The type of bearing is not particularly limited, and may be, for example, a rolling bearing such as a ball bearing or a roller bearing, a plain bearing, etc. The first bearing member 4 and the second bearing member 5 may be constituted by the same bearing or may be constituted by different bearings.

[0025] The housing 10 supports the first bearing member 4. The housing 10 defines a hollow portion 11a in which the second bearing member 5 is disposed.

[0026] Specifically, the housing 10 of this embodiment includes a side wall portion 11, a bearing support portion 12, and a cover portion 13. The side wall portion 11 defines a hollow portion 11a therein. The hollow portion 11a penetrates the side wall portion 11 in the axial direction A. The shaft portion 2 penetrates the hollow portion 11a in the axial direction A. In this embodiment, in addition to the shaft portion 2, a second bearing member 5, a bearing support 20, a coil 40, a first rotor 50, and a second rotor 60 are also arranged in the hollow portion 11a.

[0027] In this embodiment, the side wall portion 11 is formed with threaded holes 11b into which screws 31 serving as positioning members 30, which will be described later, can be screwed. These threaded holes 11b penetrate the side wall portion 11 in the radial direction C. The number and arrangement of the threaded holes 11b correspond to the number and arrangement of the screws 31 serving as positioning members 30.

[0028] The bearing support portion 12 is connected to the left end of the side wall portion 11. The bearing support portion 12 closes the left end of the hollow portion 11a. The bearing support portion 12 penetrates in the axial direction A and defines a through hole 12a that is connected to the hollow portion 11a. A first bearing member 4 is disposed in the through hole 12a of the bearing support portion 12. The inner circumferential surface that defines the through hole 12a of the bearing support portion 12 is fixed to the outer circumferential surface 4b, which serves as the fixing surface of the first bearing member 4. The shaft portion 2 passes through the through hole 12a of the bearing support portion 12.

[0029] The cover portion 13 is connected to the right end of the side wall portion 11. The cover portion 13 closes the right end of the hollow portion 11a. The cover portion 13 penetrates in the axial direction A and defines a through hole 13a that is connected to the hollow portion 11a. The shaft portion 2 passes through the through hole 13a of the cover portion 13. The inner circumferential surface that defines the through hole 13a of the cover portion 13 is disposed at a distance from the outer surface of the shaft portion 2 in the radial direction C. In other words, the cover portion 13 does not contact the shaft portion 2.

[0030] The side wall portion 11 of this embodiment is cylindrical. Therefore, the hollow portion 11a of this embodiment is columnar. The central axis of the side wall portion 11 of this embodiment coincides with the central axis O1 of the first bearing member 4. The bearing support portion 12 and the cover portion 13 of this embodiment are circular and flat. The thickness direction of the bearing support portion 12 and the cover portion 13 of this embodiment coincides with the axial direction A. However, the shapes of the side wall portion 11, the bearing support portion 12, and the cover portion 13 may be changed as appropriate.

[0031] The bearing support 20 is disposed in a hollow portion 11a defined by the housing 10. The bearing support 20 supports the second bearing member 5.

[0032] Specifically, the bearing support 20 is disposed at a distance in the radial direction C from the side wall 11 of the housing 10 by a positioning member 30, which will be described later. Therefore, when viewed from the axial direction A, a gap is formed between the outer surface 22 of the bearing support 20 and the inner surface 11c of the side wall 11 of the housing 10, which defines the hollow portion 11a (see FIG. 2). In other words, the bearing support 20 is disposed in the hollow portion 11a without contacting the housing 10.

[0033] The bearing support 20 defines a through hole 20a that penetrates in the axial direction A. A second bearing member 5 is disposed in the through hole 20a of the bearing support 20. The shaft portion 2 penetrates through the through hole 20a of the bearing support 20. The inner peripheral surface of the bearing support 20 that defines the through hole 20a is fixed to the outer peripheral surface 5b that serves as the fixing surface of the second bearing member 5.

[0034] As shown in FIG. 2 , the outer surface 22 of the bearing support 20 of this embodiment is formed with insertion recesses 21 into which screws 31 serving as positioning members 30, which will be described later, can be inserted. When viewed from the axial direction A, the insertion recesses 21 of this embodiment are grooves that are recessed inward in the radial direction C. The number and arrangement of the insertion recesses 21 correspond to the number and arrangement of the screws 31 serving as positioning members 30. The insertion recesses 21 have bottom surfaces that come into contact with the tips of the screws 31 serving as positioning members 30 when the screws 31 serving as positioning members 30 are inserted. Furthermore, the insertion recesses 21 have side surfaces that sandwich the screws 31 serving as positioning members 30 from both sides in the circumferential direction B when the screws 31 serving as positioning members 30 are inserted, thereby restricting movement of the bearing support 20 in the circumferential direction B.

[0035] As shown in Fig. 2, the bearing support 20 of this embodiment has a flat circular shape. The thickness direction of the bearing support 20 of this embodiment coincides with the axial direction A. The central axis of the bearing support 20 of this embodiment coincides with the central axis O2 of the second bearing member 5. However, the shape of the bearing support 20 may be changed as appropriate. Furthermore, the material from which the bearing support 20 is made is not particularly limited, and may be, for example, a hard resin.

[0036] The motor 1 includes at least three positioning members 30. The at least three positioning members 30 are attached to the housing 10 at different positions in the circumferential direction B of the first bearing member 4. Each of the at least three positioning members 30 is movable relative to the housing 10. The at least three positioning members 30 abut against the bearing support 20 from the outside in the radial direction C, thereby positioning the bearing support 20 relative to the housing 10 along an orthogonal plane orthogonal to the axial direction A. Note that the "orthogonal plane" referred to here does not refer to an actually existing plane, but rather to an imaginary plane.

[0037] In this embodiment, at least three positioning members 30 are arranged at equal intervals in the circumferential direction B. Specifically, the motor 1 in this embodiment includes six positioning members 30. The six positioning members 30 in this embodiment are arranged at equal intervals in the circumferential direction B. In other words, the six positioning members 30 are arranged in the circumferential direction B at intervals of a central angle of 60 degrees around the central axis O1 of the first bearing member 4.

[0038] Each of the at least three positioning members 30 of this embodiment is movable in the radial direction C relative to the housing 10. Specifically, each of the at least three positioning members 30 of this embodiment is a screw 31 that can be screwed into the housing 10. The screw 31 serving as the positioning member 30 of this embodiment can be screwed into a threaded hole 11b formed in the side wall portion 11 of the housing 10. When screwed into the housing 10, the screw 31 serving as the positioning member 30 of this embodiment penetrates the side wall portion 11 of the housing 10 in the radial direction C. When screwed into the housing 10, the screw 31 serving as the positioning member 30 of this embodiment is arranged so that its head is located outside the radial direction C and its tip is located inside the radial direction C with respect to the housing 10. In other words, when the screw 31 serving as the positioning member 30 of this embodiment is positioned so that its tip abuts against the bearing support 20 when the bearing support 20 is positioned. The screw 31 serving as the positioning member 30 can move in the radial direction C relative to the housing 10 by changing the state of engagement with the housing 10. In this manner, in this embodiment, by adjusting the state in which the screw 31 serving as the positioning member 30 is threaded into the housing 10, the position of the bearing support 20 relative to the housing 10 can be adjusted and positioned along an orthogonal plane perpendicular to the axial direction A. Therefore, the position of the second bearing member 5 supported by the bearing support 20 can also be adjusted and positioned along an orthogonal plane perpendicular to the axial direction A. This will be described in detail later (see FIGS. 4A and 4B).

[0039] The type of screw 31 serving as the positioning member 30 is not particularly limited, and may be, for example, a bolt such as a hexagonal bolt or a hexagonal socket head bolt, a thumb screw, a set screw, or the like.

[0040] The motor 1 of this embodiment further includes a coil 40, a first rotor 50, and a second rotor 60.

[0041] The coil 40 is supported by the bearing support 20. Specifically, the coil 40 of this embodiment is embedded in the bearing support 20. Both ends of the coil 40 of this embodiment in the axial direction A are exposed to the outside of the bearing support 20.

[0042] 2, in this embodiment, a plurality of coils 40 are arranged at different positions in the circumferential direction around the central axis O2 of the second bearing member 5, radially around the central axis O2 of the second bearing member 5. Specifically, twelve coils 40 are supported on the bearing support 20 in this embodiment. The twelve coils 40 in this embodiment are arranged at equal intervals in the circumferential direction around the central axis O2 of the second bearing member 5. However, the number and arrangement of the coils 40 may be changed as appropriate.

[0043] As shown in Fig. 2, the coil 40 of this embodiment has a substantially triangular shape when viewed from the axial direction A. However, the shape of the coil 40 may be modified as appropriate. Furthermore, the coil 40 of this embodiment is formed by winding a wire 41. In this embodiment, the length direction of the wire 41 is perpendicular to the axial direction A. However, the winding method of the wire 41 may be modified as appropriate.

[0044] The first rotor 50 and the second rotor 60 are attached to the shaft portion 2. The first rotor 50 and the second rotor 60 can rotate together with the shaft portion 2 as the shaft portion 2 rotates.

[0045] The first rotor 50 is disposed on the left side of the bearing support 20. The second rotor 60 is disposed on the right side of the bearing support 20. In other words, the bearing support 20 is sandwiched between the first rotor 50 and the second rotor 60 on both sides in the axial direction A. The first rotor 50 and the second rotor 60 are disposed spaced apart from the bearing support 20 in the axial direction A.

[0046] The first rotor 50 of this embodiment includes a rotating disk 51 and a magnetic pole portion 52. The rotating disk 51 of this embodiment has a flat, circular outer shape. The thickness direction of the rotating disk 51 of the first rotor 50 of this embodiment coincides with the axial direction A. A through-hole penetrating in the axial direction A is defined in the center of the rotating disk 51 of the first rotor 50 of this embodiment. The shaft portion 2 passes through this through-hole. A magnetic pole portion 52 is disposed on the outer surface on the right side of the rotating disk 51 of this embodiment. The magnetic pole portion 52 of the first rotor 50 of this embodiment has a magnetic pole surface 52a that faces the coils 40 supported by the bearing support 20 in the axial direction A. This magnetic pole surface 52a extends perpendicular to the axial direction A. The magnetic flux generated from this magnetic pole surface 52a intermittently interlinks the interiors of each coil 40 supported by the bearing support 20 as the shaft portion 2 rotates.

[0047] As shown in Fig. 3, the magnetic pole portion 52 of this embodiment is composed of a plurality of permanent magnets 53 arranged on the outer surface of the right side of the rotating disk 51. The plurality of permanent magnets 53 of this embodiment are arranged at equal intervals in the circumferential direction around the central axis of the rotating disk 51. The plurality of permanent magnets 53 of this embodiment are arranged so that the south poles and north poles are arranged alternately in the circumferential direction B. Sixteen permanent magnets 53 are arranged on the rotating disk 51 of this embodiment. However, the number and arrangement of the permanent magnets 53 may be changed as appropriate.

[0048] The second rotor 60 includes a rotating disk 61. The rotating disk 61 of this embodiment has a circular, flattened outer shape. The thickness direction of the rotating disk 61 of the second rotor 60 of this embodiment coincides with the axial direction A. A through-hole penetrating in the axial direction A is defined in the center of the rotating disk 61 of the second rotor 60 of this embodiment. The shaft portion 2 passes through this through-hole.

[0049] Unlike the first rotor 50, the second rotor 60 of this embodiment does not have magnetic pole portions. However, the second rotor 60 may have magnetic pole portions. That is, both the first rotor 50 and the second rotor 60 may have magnetic pole portions. Furthermore, in the motor 1 of this embodiment, the first rotor 50 has magnetic pole portions 52, and the second rotor 60 does not have magnetic pole portions. However, conversely, the second rotor 60 may have magnetic pole portions, and the first rotor 50 may not have magnetic pole portions. Note that, when the second rotor 60 has magnetic pole portions, the magnetic pole portions of the second rotor 60 may have magnetic pole faces that face the coils 40 supported by the bearing support 20 in the axial direction A.

[0050] The rotating disk 51 of the first rotor 50 and the rotating disk 61 of the second rotor 60 may be made of steel such as S15C. The permanent magnets 53 constituting the magnetic pole portions 52 may be Nd—Fe—B magnets, for example.

[0051] As shown in FIG. 1 , the reducer 100 is connected to the motor 1. Specifically, the reducer 100 of this embodiment is coupled to the right end of the shaft 2 of the motor 1. The reducer 100 reduces the rotation speed of the shaft 2 of the motor 1 and outputs the reduced rotation speed. Specifically, the reducer 100 includes a reduction unit 101 and a reduction shaft 102. When the shaft 2 of the motor 1 rotates, power is transmitted to the reduction shaft 102 via the reduction unit 101. As a result, the reduction shaft 102 rotates at a lower rotation speed than the shaft 2 of the motor 1. The specific configuration of the reducer 100 is not particularly limited, and may be, for example, a gear-type, belt-type, chain-type, or other type of reducer.

[0052] According to the motor 1 configured as described above, the positional relationship between the two bearing members (the first bearing member 4 and the second bearing member 5 in this embodiment) can be adjusted by providing at least three positioning members 30. This will be described in detail with reference to FIGS. 4A and 4B.

[0053] 4A and 4B are diagrams illustrating adjustment of the positional relationship between the first bearing member 4 and the second bearing member 5. For ease of explanation, only elements necessary for the explanation are shown in FIGS. 4A and 4B, and other elements are omitted. FIG. 4A illustrates a state in which the central axis O1 of the first bearing member 4 and the central axis O2 of the second bearing member 5 are misaligned in the in-plane direction along a plane perpendicular to the axial direction A. FIG. 4B illustrates a state in which the positional relationship between the first bearing member 4 and the second bearing member 5 is adjusted by moving the positioning member 30 relative to the housing 10 from the state shown in FIG. 4A. For ease of explanation, FIG. 4A exaggerates the magnitude of the misalignment between the central axis O1 of the first bearing member 4 and the central axis O2 of the second bearing member 5.

[0054] Here, the positional relationship between the first bearing member 4 and the second bearing member 5 may vary due to dimensional tolerances, construction accuracy, and the like of the elements constituting the motor 1. Specifically, as shown in FIG. 4A , the central axis O1 of the first bearing member 4 and the central axis O2 of the second bearing member 5 may be misaligned in the in-plane direction along a plane perpendicular to the axial direction A. If the shaft portion 2 is rotated in this state, the load applied to the first bearing member 4 and the second bearing member 5 increases, which may reduce the energy efficiency of the motor 1. In response to this, the motor 1 allows the positional relationship between the first bearing member 4 and the second bearing member 5 to be adjusted.

[0055] Specifically, the at least three positioning members 30 abut against the bearing support 20 from the outside in the radial direction C, thereby positioning the bearing support 20 relative to the housing 10 along an orthogonal plane perpendicular to the axial direction A. Each of the at least three positioning members 30 is movable relative to the housing 10. Therefore, for example, as shown in FIG. 4A , when the central axis O1 of the first bearing member 4 and the central axis O2 of the second bearing member 5 are misaligned in the in-plane direction along the orthogonal plane perpendicular to the axial direction A, some or all of the at least three positioning members 30 are moved relative to the housing 10. This allows the bearing support 20 to move in the direction perpendicular to the axial direction A relative to the housing 10. Next, the bearing support 20 is moved in the direction perpendicular to the axial direction A relative to the housing 10. Then, with the bearing support 20 positioned in a different position from before the movement, the bearing support 20 is repositioned relative to the housing 10 by the at least three positioning members 30 (see FIG. 4B ). This eliminates or reduces misalignment between the central axis O1 of the first bearing member 4 and the central axis O2 of the second bearing member 5 in the in-plane direction along the orthogonal plane perpendicular to the axial direction A. As a result, an increase in the load applied to the first bearing member 4 and the second bearing member 5 can be suppressed, and a decrease in the energy efficiency of the motor 1 can be suppressed.

[0056] The magnitude of the positional deviation between the central axis O1 of the first bearing member 4 and the central axis O2 of the second bearing member 5 can be estimated by measuring the current value of the motor 1. Therefore, the above-mentioned adjustment of the positional relationship between the first bearing support 20 and the second bearing support 20 can be efficiently performed by measuring the current value of the motor 1.

[0057] In this embodiment, at least three positioning members 30 are disposed at equal intervals in the circumferential direction B. This makes it possible to improve the positional stability of the bearing support 20 that is positioned by the positioning members 30.

[0058] Furthermore, in this embodiment, each of the at least three positioning members 30 is a screw 31 that can be screwed into the housing 10. This makes it easier to realize the motor 1 having the above-described configuration with a simple structure.

[0059] Furthermore, in this embodiment, an insertion recess 21 is formed on the outer surface 22 of the bearing support 20, into which the screw 31 serving as the positioning member 30 can be inserted. This improves the positional stability of the bearing support 20, which is positioned by the screw 31 serving as the positioning member 30.

[0060] The motor and motor assembly according to the present invention are not limited to the specific configurations shown in the above-described embodiments, and various modifications, changes, and combinations are possible without departing from the scope of the claims.

[0061] For example, although the reducer 100 of the present embodiment is disposed outside the housing 10 of the motor 1, the present invention is not limited to this. The reducer 100 may be incorporated inside the housing 10 of the motor 1.

[0062] Furthermore, although the motor 1 of this embodiment is connected to the reducer 100 and used as part of the motor assembly 200, the present invention is not limited to this. The motor 1 may also be used without being connected to the reducer 100.

[0063] Furthermore, although the reducer 100 of this embodiment is connected to the right end of the shaft 2 of the motor 1, the present invention is not limited to this. The reducer 100 may also be connected to the left end of the shaft 2 of the motor 1.

[0064] Furthermore, although the reducer 100 of this embodiment is directly connected to the motor 1 without any other components, this is not limiting. The reducer 100 may also be indirectly connected to the motor 1 via other components.

[0065] Furthermore, although the positioning member 30 of this embodiment is movable in the radial direction C relative to the housing 10, this is not limiting. For example, the positioning member 30 may be a member attached to the housing 10 so as to be rotatable about a predetermined rotation axis extending along the axial direction A. In this case, the positioning member 30 may be configured to move partially in the radial direction C by rotating about the predetermined rotation axis. In this way, the positioning member 30 that exhibits the above-described effect can be realized even by a member that does not move entirely in the radial direction C relative to the housing 10.

[0066] Furthermore, the motor 1 of this embodiment is a so-called axial gap motor in which the coil 40 and the magnetic pole surface 52a of the magnetic pole portion 52 face each other in the axial direction A, but is not limited to this. The motor 1 may also be a so-called radial gap motor. [Industrial Applicability]

[0067] The present invention relates to a motor and a motor assembly. [Explanation of symbols]

[0068] 1: Motor 2: Shaft 2a: First outer peripheral surface part 2b: Second outer peripheral surface part 4: First bearing member 4a: Inner surface of the first bearing member 4b: Outer surface of the first bearing member 5: Second bearing member 5a: Inner surface of second bearing member 5b: Outer surface of second bearing member 10: Housing 11: Side wall 11a: Hollow part 11b: screw hole 11c: Inner surface of side wall 12: Bearing support part 12a: Through hole in bearing support 13: Cover part 13a: Through hole in the cover 20: Bearing support 20a: Through hole of bearing support 21: Insertion recess 22: Outer surface of bearing support 30: Positioning member 31: Screw 40: Coil 41: Winding 50: First rotor 51: Rotary disc of first rotor 52:Magnetic pole part 52a: Magnetic pole surface 53: Permanent magnet 60: Second rotor 61: Second rotor turntable 100: Reducer 101: Reduction section 102: Reduction shaft part 200: Motor assembly A: Axial direction B: Circumferential direction C: Radial direction O1: Central axis of the first bearing member O2: Central axis of the second bearing member

Claims

1. A shaft portion; a first bearing member for supporting the shaft portion; a second bearing member that is disposed apart from the first bearing member in the axial direction of the first bearing member and supports the shaft portion; a housing that supports the first bearing member and defines a hollow portion in which the second bearing member is disposed; a bearing support member disposed in the hollow portion and supporting the second bearing member; and at least three positioning members that are movably attached to the housing at different circumferential positions of the first bearing member and that abut against the bearing support from the radial outside of the first bearing member, thereby positioning the bearing support relative to the housing along an orthogonal plane that is perpendicular to the axial direction.

2. The motor of claim 1 , wherein each of the at least three positioning members is movable in the radial direction relative to the housing.

3. The motor of claim 2 , wherein each of the at least three positioning members is a screw that can be threadedly engaged with the housing.

4. 4. The motor according to claim 3, wherein an insertion recess into which the screw can be inserted is formed on an outer surface of the bearing support.

5. 5. The motor according to claim 1, wherein the at least three positioning members are arranged at equal intervals in the circumferential direction.

6. a coil supported by the bearing support; 5. The motor according to claim 1, further comprising: a rotor attached to the shaft portion and including a magnetic pole portion having a magnetic pole face facing the coil in the axial direction.

7. A motor according to any one of claims 1 to 4; a reducer connected to the motor.

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